Power Module Auxiliary Path Layout for Lower Parasitic Inductance
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Solution Overview
Problem
Existing power modules face challenges with parasitic inductances in auxiliary paths, leading to oscillations and switching losses, particularly at high switching frequencies used in applications like electric vehicles.
Innovation Solution
The power module incorporates auxiliary paths with connection portions featuring multiple connectors electrically connected in parallel, reducing parasitic inductance and improving electromagnetic behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single connector is used in the auxiliary path, then the device complexity is reduced, but the parasitic inductance increases leading to oscillations and switching losses
Solution Approach 1:
The connection portion is segmented into multiple connectors (at least two) that are electrically connected in parallel within the auxiliary path. This segmentation reduces the parasitic inductance by distributing the current across multiple parallel paths, thereby minimizing oscillations and switching losses while maintaining control functionality.
2Ease of manufacture
If a single connector is used in the auxiliary path, then the manufacturing process is simplified, but oscillations occur due to high parasitic inductance
Solution Approach 1:
The auxiliary path connection is divided into multiple parallel connectors, which reduces parasitic inductance and stabilizes the electromagnetic behavior by preventing oscillations. The segmentation approach maintains manufacturing feasibility while significantly improving electrical performance.
3Productivity
If multiple connectors are used in parallel in the auxiliary path, then the parasitic inductance is reduced and switching frequency utilization is enhanced, but the device complexity increases
Solution Approach 1:
The connection portion is divided into multiple parallel connectors that reduce parasitic inductance, enabling higher switching frequency utilization. The segmented structure achieves improved electromagnetic performance by distributing current paths while maintaining a manageable complexity level through standardized connector configurations.
Data Source
AI summary
A power module (1) comprising at least one substrate (2), at least one switching device (3) located on the substrate (2), at least one power path (6) for supplying power to the at least one switching device (3) and at least one auxiliary path (7, 10) for controlling and/or monitoring the switching device (3), wherein the at least one auxiliary path (7, 10) comprises at least one connection portion (9, 12, 17, 18, 19) that comprises two or more connectors (8, 11, 20) electrically connected in parallel. wherein the power module (1) comprises several switching devices (3) having corresponding auxiliary paths (7, 10), wherein at least one of the corresponding auxiliary paths (7, 10) comprises a connection portion (9, 12, 17, 18, 19) with parallel connectors (8, 11. 20) and wherein at least another one of the corresponding auxiliary paths (7, 10) comprises a connection portion (9, 12, 17, 18, 19) with parallel connectors (8, 11, 20) or comprises a connection portion (13) with a single connector, wherein the number of the connectors (8, 11, 20) is different in